Just a Regular ole cake

Not what it’s really called. From the Cake Doctor Book.
(makes a good yellow cake)

1 package Duncan Hines white cake mix
1 cup whole milk
1 stick butter, melted
3 large eggs
2 tsp. Vanilla
Fluffy Chocolate frosting (below)

You can use a 9x13-inch pan or two round pans for this. Grease (and flour if using round) and preheat over to 350 degrees.
Place the cake mix, milk, melted butter, eggs, and vanilla in a large mixing bowl. Blend with a mixer on low speed. Scrape down sides and mix on medium speed for 2 more minutes. Pour into the pan(s) and smooth. I like to drop it a few inches to get the air bubbles out of it.
Bake the cakes until they are golden brown and spring back when lightly touched 25-30 minutes.
Fluffy Chocolate Frosting:
1 stick butter, softened
2/3 cup unsweetened cocoa
3 cups powdered sugar, sifted
1/3 cup whole milk
2 tsp. Vanilla
¼ tsp. Salt
Blend the butter and cocoa for 30 seconds. Add the powdered sugar, miolk, vanilla and salt and beat with the mixer on low speed until the frosting lightens and is fluffy, 2 to 3 minutes. Add more milk if the frosting is too thick or powdered sugar, 1 Tblsp. at a time, if the frosting is too thin.